package com.sky.service.impl;


import com.sky.context.BaseContext;
import com.sky.dto.ShoppingCartDTO;
import com.sky.entity.Dish;
import com.sky.entity.Setmeal;
import com.sky.entity.ShoppingCart;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.mapper.ShoppingCartMapper;
import com.sky.service.ShoppingCartService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.time.LocalDateTime;
import java.util.List;

@Service
@Slf4j
public class ShoppingCartServiceImpl implements ShoppingCartService {
    @Autowired
    private ShoppingCartMapper shoppingCartMapper;
    @Autowired
    private DishMapper dishMapper;
    @Autowired
    private SetmealMapper setmealMapper;
    /**
     * 添加购物车
     * @param shoppingCartDTO
     */
    @Override
    public void addShoppingCart(ShoppingCartDTO shoppingCartDTO) {
            //判断商品是否存在
        ShoppingCart shoppingCart = new ShoppingCart();
        BeanUtils.copyProperties(shoppingCartDTO,shoppingCart);
        shoppingCart.setUserId(BaseContext.getCurrentId());
        List<ShoppingCart> list = shoppingCartMapper.list(shoppingCart);
           //已经存在，数量+1
            if(!list.isEmpty()){
                ShoppingCart cart = list.get(0);
                cart.setNumber(cart.getNumber()+1);
                shoppingCartMapper.updateNumberById(cart);
            }
            else
            {
                //不存在，需要插入一条购物车数据

                //判断本次添加的是菜品还是套餐
                Long dishId = shoppingCartDTO.getDishId();
                Long setmealId = shoppingCartDTO.getSetmealId();
               if(dishId != null) {
                    //本次添加的是菜品
                   Dish dish = dishMapper.getById(dishId);
                   shoppingCart.setName(dish.getName());
                   shoppingCart.setImage(dish.getImage());
                   shoppingCart.setAmount(dish.getPrice());

                }else{
                   //本次添加的是套餐
                   Setmeal setmeal = setmealMapper.getById(setmealId);
                   shoppingCart.setName(setmeal.getName());
                   shoppingCart.setImage(setmeal.getImage());
                   shoppingCart.setAmount(setmeal.getPrice());
               }
                shoppingCart.setNumber(1);
                shoppingCart.setCreateTime(LocalDateTime.now());
                shoppingCartMapper.insert(shoppingCart);
            }

    }

    @Override
    public List<ShoppingCart> showShoppingCart() {
        //获取到当前微信用户的id
        Long userId = BaseContext.getCurrentId();
        ShoppingCart shoppingCart = ShoppingCart.builder()
                .userId(userId)
                .build();
        List<ShoppingCart> list = shoppingCartMapper.list(shoppingCart);
        return list;
    }

    @Override
    public void clean() {
        //获取到当前微信用户的id
        Long userId = BaseContext.getCurrentId();
        shoppingCartMapper.deleteByUserId(userId);
    }
}
